.pdfContext {  
  float: left;  
  width: 100%;  
  height: 100%;  
}  
  
.pdfPage {  
  float: left;  
  width: 100%;  
  height: 100%;  
}  
  
.pdfViewer {  
  float: left;  
  width: 100%;  
  height: 100%;  
}

.loading{
  position: absolute;
  left: 50%;
  top: 50%;
  width: 50px;
  height: 50px;
  transform: translate(-50%,-50%);
  -webkit-transform: translate(-50%,-50%);
  -moz-transform: translate(-50%,-50%);
  -ms-transform: translate(-50%,-50%);
  -o-transform: translate(-50%,-50%);
}